Minimum And Maximum Air Volume - Siemens RDG400KN Basic Documentation

ACS
Heating OR cooling
Heating AND cooling
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Siemens
Building Technologies
The state (heating or cooling) of the thermostat can be monitored with the ACS tool
(diagnostic value "Control sequence"). The last active mode is displayed when the
thermostat is in the dead zone or temperature control is disabled.
On single-duct applications, the control sequence state is determined by the
application mode (see section 3.6.2) and by the state of the heating/cooling
changeover signal (via local sensor or bus), or fixed according to the selected
control sequence (P01 = heating (0)/cooling (1)).
Application State changeover/conti-
mode (via bus) nuous heating or cooling
Heating
Auto (0)
Cooling
Heat (1), (2), (8) Heating
Cooling
Heating
Cool (3), (5)
Cooling
Night purge (4), Heating
Fan only (9) Cooling
On applications "Single-duct with electric heater/radiator/heating/cooling coil", the
control sequence state depends on the application mode and the heating/cooling
demand.
Application Heating/cooling demand
mode (via bus)
Heating
No demand
Auto (0)
Cooling
Heating
Heat (1), (2), (8) No demand
Cooling
Heating
Cool (3), (5) No demand
Cooling
Night purge (4), No temperature control active
Fan only (9)
3.6.4

Minimum and maximum air volume

The factory setting for minimum and maximum air volume is 0/100% respectively.
These values can be changed via P63/P64. Alternatively, Vmin and Vmax can be
set directly on the VAV compact controller (G..B181.E/KN).
If Vmin is greater than 0, a minimum air flow Vmin is ensured in both Comfort and
Economy mode.
In Protection mode (or Economy with setpoint = OFF), Vmin is fixed to 0.
Comfort or Economy mode
RDG400KN,RGD405KN Basic documentation
Control sequence state
(ACS diagnostic value)
Heating
Cooling
Heating
Heating
Cooling
Cooling
Heating
Cooling
Control sequence state
(ACS diagnostic value)
Heating
Heating/cooling depending
on last active sequence
Cooling
Heating
Heating
Heating
Cooling
Cooling
Cooling
Heating/cooling depending
on last active sequence
Protection mode: Vmin always = 0
CE1P3192en
2017-02-17